Use of a Broken or Risky Cryptographic Algorithm Affecting libgcrypt20 package, versions <1.8.7-6


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.25% (65th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-LIBGCRYPT20-1582893
  • published7 Sept 2021
  • disclosed6 Sept 2021

Introduced: 6 Sep 2021

CVE-2021-40528  (opens in a new tab)
CWE-327  (opens in a new tab)

How to fix?

Upgrade Debian:unstable libgcrypt20 to version 1.8.7-6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

CVSS Scores

version 3.1